///
/// Copyright (c) 2017 Sensus Metering Systems
///
using log4net;

namespace TBF.BenchControl.MettlerToledo
{
	public class WaitTankEmptyOp : IOperation
	{
		private static readonly ILog log = LogManager.GetLogger(typeof(WaitTankEmptyOp));
		public override string ToString() { return string.Format("WaitTankEmptyOp()"); }

		readonly GenericDevices.ITankDraining tankDraining;

		bool conditionMet;

		/// <summary>
		/// Events:  ConditionMet, ConditionNotMet
		/// </summary>
		/// <param name="tankDraining">Tank draining (Balance device) instance</param>
		public WaitTankEmptyOp(GenericDevices.ITankDraining tankDraining)
        {
			this.tankDraining = tankDraining;
			log.Debug(this.ToString());
        }

		/// <summary>Start this operation</summary>
		public void Start()
        {
			conditionMet = tankDraining.IsEmpty();
		}

		/// <summary>Run this operation</summary>
		/// <returns>
		///		Event.ConditionMet . . . tank is empty
		///		Event.ConditionNotMet  . tank is not empty
		/// </returns>
		public Event Run()
		{
			conditionMet = conditionMet || tankDraining.IsEmpty();

			return conditionMet ? Event.ConditionMet : Event.ConditionNotMet;
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
		}
	}
}